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5 ways to initialize lazy relations and when to use them

java-interview-questions-answers

Lazy loading of relations between entities is a well established best practice in JPA. Its main goal is to retrieve only the requested entities from the database and load the related entities only if needed. That is a great approach, if we only need the requested entities. But it creates additional work and can be the cause of performance problems, ...

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One Jar To Rule Them All: Arquillian + Java 8

java-interview-questions-answers

With Java 8, a lot of new language improvements have been implemented for making life of developer easier. In my opinion, one of the greatest things it has Java 8 is that in some situations developed code looks more beautiful that using prior approaches, and I am referring in Lambdas and Method references. This post is not about learning these ...

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Gradle Goodness: Continue Build Even with Failed Tasks

If we run a Gradle build and one of the tasks fails, the whole build stops immediately. So we have fast feedback of our build status. If we don’t want to this and want Gradle to execute all tasks, even though some might have failed, we use the command line option --continue. When we use the --continue command line option ...

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On heap vs off heap memory usage

Overview I was recently asked about the benefits and wisdom of using off heap memory in Java. The answers may be of interest to others facing the same choices. Off heap memory is nothing special. The thread stacks, application code, NIO buffers are all off heap.  In fact in C and C++, you only have unmanaged memory as it does not have ...

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JGit Authentication Explained

Authentication in JGit is mostly on par with native Git. Commonly used protocols like SSH and HTTP(S) and their authentication methods are supported. This article summarizes how to use the JGit authentication API to securely access remote Git repositories. Though the examples in this article use the CloneCommand, the described techniques can be applied to all classes that connect to ...

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When Should You Move from Iterations to Flow?

I’m writing part of the program management book, talking about how you need to keep everything small to maintain momentum. Sometimes, to keep your work small, teams move from iterations to flow. Here are times when you might consider moving from iteration to flow:             The Product Owner wants to change the order of features ...

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Self-healing JVM

This post is an example about an application where the first solution to each and every IT problem – “have you tried turning it off and on again” – can backfire and do more harm than good. Instead of turning things off and on, we have an application that can literally heal itself: it fails at the beginning, but starts ...

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